NICER observation list: Target ID 263401

Abstract

We propose a campaign of joint NuSTAR and NICER observations of the quiescent neutron star Cen X-4, to study the relationship between its soft X-ray flux level and its hard X-ray spectrum. The hard X-ray spectrum has been hypothesized to be due to thermal bremsstrahlung from active accretion onto the neutron star, and may transit to synchrotron emission at low flux. If the bremsstrahlung/active accretion hypothesis is correct, we should be able to measure spectral changes with our proposed campaign.
Obsid RA DEC l b Start End Exposure Number of
Modules
Number of
Processing
Status of
Processing
Date of
Processing
Public
date
2634010101 224.589 -31.667 332.242 23.884 58690.7815 58690.9250 2783.0 52 2 VALIDATED 58695.9 59064
2634010102 224.591 -31.669 332.242 23.882 58691.1042 58691.5579 4339.0 52 1 VALIDATED 58695.9 59065
2634010201 224.591 -31.669 332.242 23.881 58735.1011 58735.8414 7464.0 52 3 VALIDATED 58739.6 59109